/usr/include/mlpack/methods/nystroem_method/random_selection.hpp is in libmlpack-dev 1.0.10-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | /**
* @file random_selection.hpp
* @author Ryan Curtin
*
* Randomly select some points (with replacement) to use for the Nystroem
* method. Replacement is suboptimal, but for rank << number of points, this is
* unlikely.
*
* This file is part of MLPACK 1.0.10.
*
* MLPACK is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* MLPACK is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details (LICENSE.txt).
*
* You should have received a copy of the GNU General Public License along with
* MLPACK. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MLPACK_METHODS_NYSTROEM_METHOD_RANDOM_SELECTION_HPP
#define __MLPACK_METHODS_NYSTROEM_METHOD_RANDOM_SELECTION_HPP
#include <mlpack/core.hpp>
namespace mlpack {
namespace kernel {
class RandomSelection
{
public:
/**
* Randomly select the specified number of points in the dataset.
*
* @param data Dataset to sample from.
* @param m Number of points to select.
* @return Indices of selected points from the dataset.
*/
const static arma::Col<size_t> Select(const arma::mat& data, const size_t m)
{
arma::Col<size_t> selectedPoints(m);
for (size_t i = 0; i < m; ++i)
selectedPoints(i) = math::RandInt(0, data.n_cols);
return selectedPoints;
}
};
}; // namespace kernel
}; // namespace mlpack
#endif
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